Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX06 KWNP 200625
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2017 Nov 20 0558 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#                7-day Space Weather Highlights
#
Highlights of Solar and Geomagnetic Activity
13 - 19 November 2017

Solar activity was at very low levels throughout the period. Several
B-class flares were observed from Region 2687 (S08, L=180,
class/area Cao/090 on 16 Nov). The largest was a B7 flare at 13/0648
UTC. No Earth-directed coronal mass ejections were observed.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached
moderate levels on 16 Nov and high levels on 13-15 and 17-19 Nov.
The largest flux of the period was 20,582 pfu observed at 13/1455
UTC.

Geomagnetic field activity ranged from quiet to active levels. The
period began with solar wind speed between 370-430 km/s and total
field between 2-9 nT. A prolonged period of -Bz reaching -7 nT was
observed between 14/1322-2256 UTC. The geomagnetic field responded
with quiet levels on 13 Nov and quiet to unsettled levels on 14 Nov.
By 15 Nov, total field increased to a maximum of 15 nT at 15/1858
UTC while the Bz component deflected southward to a maximum of -9 nT
at 16/0100 UTC. Solar wind speed increased to around 520 km/s late
on 15 Nov through 16 Nov as a positive polarity coronal hole high
speed stream (CH HSS) became geoeffective. By 16/0900 UTC, total
field decreased to 5 nT while solar wind speed began decreasing
early on 17 Nov. The period ended at nominal levels with solar wind
speed near 380 km/s. The geomagnetic field responded with quiet to
active levels on 15-16 Nov, quiet to unsettled levels on 17 and 19
Nov, and quiet levels on 18 Nov.



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